@media screen and (min-width: 1001px) {
  .main {
    flex: 1;
    display: flex;
    justify-content: center;
    background-color: #ccc;
  }
  .main .main_box {
    flex: 1;
    display: flex;
    margin: 20px 15px 20px 15px;
    max-width: 1300px;
    justify-content: space-around;
  }
  .main .main_box .left {
    display: flex;
    flex: 3;
    max-width: 995px;
    height: 100%;
    flex-direction: column;
    border-radius: 16px;
    background-color: #fff;
    margin-right: 15px;
    /* padding: 10px 0px; */
  }
  .main .main_box .register {
    display: flex;
    flex: 1;
    max-width: 280px;
    flex-direction: column;
  }
}
@media screen and (min-width: 100px) and (max-width: 1000px) {
  .main {
    flex: 1;
    display: flex;
    justify-content: center;
    background-color: #ccc;
  }
  .main .main_box {
    flex: 1;
    display: flex;
    margin: 10px 5px 10px 5px !important;
    max-width: 1300px;
    justify-content: space-around;
    margin: 30px 20px 30px 20px;
  }
  .main .main_box .left {
    position: relative;
    display: flex;
    flex: 1;
    max-width: 995px;
    height: 100%;
    flex-direction: column;
    border-radius: 16px;
    background-color: #fff;
    /* padding: 10px 0px; */
  }
  .main .main_box .register {
    display: none;
    flex: 1;
    flex-direction: column;
  }
}
